DE69800348T2 - Rake receiver finger allocation to avoid duplication of path tracking - Google Patents
Rake receiver finger allocation to avoid duplication of path trackingInfo
- Publication number
- DE69800348T2 DE69800348T2 DE69800348T DE69800348T DE69800348T2 DE 69800348 T2 DE69800348 T2 DE 69800348T2 DE 69800348 T DE69800348 T DE 69800348T DE 69800348 T DE69800348 T DE 69800348T DE 69800348 T2 DE69800348 T2 DE 69800348T2
- Authority
- DE
- Germany
- Prior art keywords
- rake receiver
- avoid duplication
- path tracking
- receiver finger
- finger allocation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
- H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
- H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Transmission System (AREA)
- Noise Elimination (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/903,626 US6345078B1 (en) | 1997-07-31 | 1997-07-31 | Finger assignment system for a multiple finger receiver and method thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69800348D1 DE69800348D1 (en) | 2000-11-16 |
DE69800348T2 true DE69800348T2 (en) | 2001-02-22 |
Family
ID=25417815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69800348T Expired - Lifetime DE69800348T2 (en) | 1997-07-31 | 1998-07-21 | Rake receiver finger allocation to avoid duplication of path tracking |
Country Status (5)
Country | Link |
---|---|
US (1) | US6345078B1 (en) |
EP (1) | EP0896438B1 (en) |
JP (2) | JP3425372B2 (en) |
CA (1) | CA2241712C (en) |
DE (1) | DE69800348T2 (en) |
Families Citing this family (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6078611A (en) * | 1997-09-16 | 2000-06-20 | Motorola, Inc. | Rake receiver and finger management method for spread spectrum communication |
US6515977B2 (en) * | 1997-11-05 | 2003-02-04 | Lucent Technologies Inc. | De-assigning signals from the fingers of a rake receiver |
US6421334B1 (en) * | 1998-05-13 | 2002-07-16 | Nortel Networks Limited | Technique for time alignment of uplink CDMA signals |
JP3031349B2 (en) * | 1998-09-02 | 2000-04-10 | 日本電気株式会社 | CDMA signal receiver |
JP3031353B1 (en) * | 1998-09-29 | 2000-04-10 | 日本電気株式会社 | Receiving circuit, mobile terminal having the same, and receiving method |
DE19845620A1 (en) * | 1998-10-05 | 2000-04-27 | Systemonic Ag | Method for receiving spread spectrum signals |
US6560273B1 (en) | 1998-10-07 | 2003-05-06 | Ericsson Inc. | Delay searcher and delay trackers interaction for new delays assignment to rake fingers |
JP2000252871A (en) * | 1999-03-01 | 2000-09-14 | Sony Corp | Method and device for receiving |
US6314130B1 (en) * | 1999-04-28 | 2001-11-06 | Dspc Technologies, Ltd. | System and method for joint time tracking of multiple paths |
JP3319436B2 (en) * | 1999-06-02 | 2002-09-03 | 日本電気株式会社 | CDMA mobile communication device, searcher circuit, and communication method |
US7184457B2 (en) * | 2000-02-28 | 2007-02-27 | Texas Instruments Incorporated | Spread spectrum path estimation |
GB0007750D0 (en) * | 2000-03-30 | 2000-05-17 | Ubinetics Ltd | A rake receiver and a method of operating a rake receiver |
JP2003530001A (en) * | 2000-03-30 | 2003-10-07 | ユビネティクス リミテッド | Rake receiver and method of operating a rake receiver |
WO2002003562A1 (en) * | 2000-07-03 | 2002-01-10 | Mitsubishi Denki Kabushiki Kaisha | Timing correcting device and timing correcting method |
US6647077B1 (en) * | 2000-07-31 | 2003-11-11 | Rf Micro Devices, Inc. | Multipath parameter estimation in spread-spectrum communications systems |
US6600777B1 (en) * | 2000-09-29 | 2003-07-29 | Qualcomm, Incorporated | Assignment and deassignment of CDMA second finger |
JP3476009B2 (en) | 2000-10-11 | 2003-12-10 | 日本電気株式会社 | Mobile station and its finger assignment method in CDMA communication system |
JP3441431B2 (en) | 2000-11-09 | 2003-09-02 | 日本電気株式会社 | RAKE receiver and receiving method |
CN1199372C (en) * | 2000-12-04 | 2005-04-27 | 三菱电机株式会社 | Syntesis receiving method and synthesis receiver |
US7769078B2 (en) | 2000-12-22 | 2010-08-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Apparatus, methods and computer program products for delay selection in a spread-spectrum receiver |
US6731676B2 (en) * | 2001-01-11 | 2004-05-04 | Qualcomm Inc | Assigning clusters of demodulation elements in a spread spectrum system |
US6771692B2 (en) * | 2001-01-11 | 2004-08-03 | Qualcomm Incorporated | Time tracking in a non-negligible multipath spacing environment |
US7277471B2 (en) * | 2001-01-11 | 2007-10-02 | Qualcomm Incorporated | Time-tracking for clustered demodulation elements in a spread spectrum system |
JP3857528B2 (en) * | 2001-01-12 | 2006-12-13 | 富士通株式会社 | Synchronous detection device |
US6970499B2 (en) * | 2001-05-30 | 2005-11-29 | Koninklijke Philips Electronics N.V. | Varying early-late spacing in a delay locked loop |
US7012952B2 (en) * | 2001-08-01 | 2006-03-14 | Qualcomm Incorporated | Method and apparatus for adjusting delay in systems with time-burst pilot and fractionally spaced equalizers |
GB2385498A (en) * | 2002-02-13 | 2003-08-20 | Pa Consulting Services | Adjustable baseband processing of telecommunications signals |
US7190750B2 (en) * | 2002-02-28 | 2007-03-13 | Qualcomm Incorporated | Rake receiver for tracking closely spaced multipath |
TWI236245B (en) * | 2002-03-07 | 2005-07-11 | Benq Corp | Method of tracking finger assignment |
US7190929B2 (en) * | 2002-03-15 | 2007-03-13 | Benq Corporation | Method and apparatus of RAKE finger management in RAKE receiver |
US6795452B2 (en) | 2002-05-31 | 2004-09-21 | Sandbridge Technologies, Inc. | Method of tracking time intervals for a communication signal |
US7194051B2 (en) * | 2002-06-13 | 2007-03-20 | Qualcomm Incorporated | Finger merge protection for rake receivers |
US7061971B2 (en) * | 2002-07-11 | 2006-06-13 | Qualcomm Incorporated | Method and apparatus for diversity searching and demodulator assignment in a wireless communication system |
US7340017B1 (en) * | 2002-07-30 | 2008-03-04 | National Semiconductor Corporation | System and method for finger management in a rake receiver |
US20040072553A1 (en) * | 2002-09-20 | 2004-04-15 | Xiaohui Wang | Methods, systems, and computer program products for selecting delay positions for a RAKE receiver by adjusting the delay positions based on comparisons of signal to interference ratios and/or powers for multi-path signals over time |
EP1551109B1 (en) * | 2004-01-05 | 2009-11-25 | STMicroelectronics N.V. | Method of cancelling of false echoes in a Rake receiver |
US7058117B1 (en) * | 2004-07-26 | 2006-06-06 | Sandbridge Technologies, Inc. | Rake receiver with multi-path interference accommodation |
US7403557B2 (en) * | 2004-07-27 | 2008-07-22 | Nokia Corporation | Apparatus and method for hybrid traffic and pilot signal quality determination of finger lock status of rake receiver correlators |
US7630427B2 (en) * | 2005-09-29 | 2009-12-08 | Qualcomm Incorporated | Systems, methods, and apparatus for establishing finger lock state |
CN102142860B (en) * | 2010-01-29 | 2014-01-29 | 上海摩波彼克半导体有限公司 | Method for multi-path combining control of RAKE receiver in third-generation mobile communication system |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5233626A (en) | 1992-05-11 | 1993-08-03 | Space Systems/Loral Inc. | Repeater diversity spread spectrum communication system |
AU677079B2 (en) * | 1993-06-14 | 1997-04-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Time alignment of transmission in a down-link of a CDMA system |
US5490165A (en) | 1993-10-28 | 1996-02-06 | Qualcomm Incorporated | Demodulation element assignment in a system capable of receiving multiple signals |
JP2605615B2 (en) * | 1993-12-30 | 1997-04-30 | 日本電気株式会社 | Spread spectrum receiver |
JPH07335209A (en) | 1994-06-10 | 1995-12-22 | Matsushita Electric Ind Co Ltd | Coated electrode for battery, and its manufacture |
US6173014B1 (en) * | 1994-08-02 | 2001-01-09 | Telefonaktiebolaget Lm Ericsson | Method of and apparatus for interference rejection combining and downlink beamforming in a cellular radio communications system |
US5710768A (en) * | 1994-09-30 | 1998-01-20 | Qualcomm Incorporated | Method of searching for a bursty signal |
US5619524A (en) * | 1994-10-04 | 1997-04-08 | Motorola, Inc. | Method and apparatus for coherent communication reception in a spread-spectrum communication system |
US5691974A (en) * | 1995-01-04 | 1997-11-25 | Qualcomm Incorporated | Method and apparatus for using full spectrum transmitted power in a spread spectrum communication system for tracking individual recipient phase, time and energy |
US5659353A (en) * | 1995-03-17 | 1997-08-19 | Bell Atlantic Network Services, Inc. | Television distribution system and method |
US5671221A (en) * | 1995-06-14 | 1997-09-23 | Sharp Microelectronics Technology, Inc. | Receiving method and apparatus for use in a spread-spectrum communication system |
JPH0974372A (en) * | 1995-09-04 | 1997-03-18 | Matsushita Electric Ind Co Ltd | Spread spectrum radio transmitter-receiver |
JP3745430B2 (en) * | 1995-12-22 | 2006-02-15 | 株式会社エヌ・ティ・ティ・ドコモ | CDMA multipath search method and CDMA signal receiver |
JP2820918B2 (en) * | 1996-03-08 | 1998-11-05 | 株式会社ワイ・アール・ピー移動通信基盤技術研究所 | Spread spectrum communication equipment |
US6047017A (en) * | 1996-04-25 | 2000-04-04 | Cahn; Charles R. | Spread spectrum receiver with multi-path cancellation |
US5818887A (en) * | 1996-07-26 | 1998-10-06 | Motorola, Inc. | Method for receiving a signal in a digital radio frequency communication system |
US6009089A (en) * | 1996-08-20 | 1999-12-28 | Lucent Technologies Inc. | Pilot interference cancellation for a coherent wireless code division multiple access receiver |
US5945948A (en) * | 1996-09-03 | 1999-08-31 | Motorola, Inc. | Method and apparatus for location finding in a communication system |
US5887021A (en) * | 1996-09-23 | 1999-03-23 | Nokia Telecommunications Oy | Base station receiver and a method for receiving a signal |
US5920284A (en) * | 1996-09-30 | 1999-07-06 | Qualcomm Incorporated | Ambiguity resolution for ambiguous position solutions using satellite beams |
-
1997
- 1997-07-31 US US08/903,626 patent/US6345078B1/en not_active Expired - Lifetime
-
1998
- 1998-06-25 CA CA002241712A patent/CA2241712C/en not_active Expired - Fee Related
- 1998-07-21 EP EP98305815A patent/EP0896438B1/en not_active Expired - Lifetime
- 1998-07-21 DE DE69800348T patent/DE69800348T2/en not_active Expired - Lifetime
- 1998-07-28 JP JP21318598A patent/JP3425372B2/en not_active Expired - Fee Related
-
2003
- 2003-02-28 JP JP2003053758A patent/JP3676352B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0896438A1 (en) | 1999-02-10 |
DE69800348D1 (en) | 2000-11-16 |
CA2241712C (en) | 2002-10-01 |
JP3425372B2 (en) | 2003-07-14 |
JP2003244029A (en) | 2003-08-29 |
EP0896438B1 (en) | 2000-10-11 |
CA2241712A1 (en) | 1999-01-31 |
JPH1198056A (en) | 1999-04-09 |
US6345078B1 (en) | 2002-02-05 |
JP3676352B2 (en) | 2005-07-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |